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Activities 67
Procedure
1. Press z. Select Par, Simul, and the default settings.
2. Press p. Set the viewing window.
3. Press o. Turn off all functions and stat plots. Enter the expressions
to define the unit circle centered on (0,0).
4. Enter the expressions to define the sine curve.
5. Press r. As the graph is plotting, you may press Í to pause
and Í again to resume graphing as you watch the sine function
“unwrap” from the unit circle.
Note: You can generalize the unwrapping. Replace sin(T) in Y2T with
any other trig function to unwrap that function.
Finding the Area between Curves
Problem
Find the area of the region bounded by:
Tmin=0
Tmax=2
p
Tstep=.1
Xmin=
L2
Xmax=7.4
Xscl=
pà2
Ymin=
L3
Ymax=3
Yscl=1
f(x)
g(x)
x
=
=
=
300x/(x
2
+ 625)
3cos(.1x)
75